"Nature of the defect or failure to comply and the safety hazard which is created or could be created by such defect or failure to comply.

"The two flanges identified with deviations on Passive Core Cooling System pipe spools for the Vogtle Unit 3 AP1000r project had incorrect raised-face dimensions. This appears to have been caused by the two flanges being transposed due to an inadvertent fabrication error that occurred at the pipe spool supplier's facilities (CB&I Laurens). The error was subsequently discovered after delivery to the fabrication facility (Aecon Industrial).

"This error resulted in conditions where the two flanged connections would not have met the design configuration. If the flanged connections had been assembled in the delivered configuration, it is not known if system integrity and operability would have been maintained during operation. The incorrect configuration could have also led to subsequent failure after installation and operation. Hydrostatic testing of these connections is required, but had not yet been performed because the condition was discovered prior to the assembly and testing of these portions of the system. The condition is being corrected prior to the performance of that hydrostatic testing, therefore it is not known if the flanges in the incorrect configuration would have been able to pass hydrostatic testing.

"Due to the possibility that system integrity and operability could have been impacted by the use of the incorrect flanges, it has been conservatively concluded that this condition should be reported under 10 CFR Part 21. This conservative conclusion is based on the possibility that the Passive Core Cooling System could have been adversely impacted by the identified deviations, if the deviations had been left uncorrected.

"The corrective action which has been, is being, or will be taken; the name of the individual or organization responsible for the action; and the length of time that has been or will be taken to complete the action.

". . . The flange configuration was corrected and the Q223 Mechanical Module was delivered to the Vogtle Unit 3 site on September 23, 2016. A corrective action report has been entered into the Westinghouse/WECTEC system to further evaluate the circumstances that led to the identified deviations."

WECTEC LLC determined that additional pipe spools with incorrect flange configurations were fabricated for V.C. Summer Unit 3 and Vogtle Unit 4. None of the pipe spools were installed in either of the facilities. Corrective actions have been taken to prevent re-occurrence.

The following was received by email from the Texas Department of State Health Services:

"On March 7, 2017, the Agency [Texas Department of State Health Services] was contacted by a representative of the licensee to report that on the previous day a gauge was found to have a stuck shutter. The gauge is a Berthold LB 7442D with a 30 mCi Cs-137 source. The shutter is stuck in the normal operating position. The licensee is in contact with the manufacturer for a repair plan and with licensing for an exemption to operate the gauge temporarily with a stuck shutter. No exposures to the public are expected. Additional information will be shared as it becomes available in accordance with SA-300.

RADIOGRAPHY CAMERA SOURCE DID NOT LOCK IN THE SHIELDED POSITION WHEN RETRACTED

While performing radiography in arctic conditions at the Alpine oil field between ice roads CD1 and CD5, the radiographer retracted the source after an exposure and failed to recognize that the source was not in the locked position. Prior to moving the radiography camera to the next area for an exposure, the survey indicated the source was in the shielded position. The radiographer picked up the camera to take it to the next weld location for an exposure. When the radiographer placed the radiography camera down, his dosimeter rate alarm sounded, his survey meter (on the 10 scale setting) was off scale and his pocket dosimeter was off scale. It is believed that during the moving of the camera to the next shot location the source came out of the fully shielded position. The exact time and distance of the exposure is not known. Calculations show that the radiographer may have received between 3.5R - 39R of exposure. The radiographer's dosimeter has been sent for processing and results are expected in approximately 2 days. The assistant radiographer was not in the direct vicinity and received no exposure due to this event. The radiography camera involved was a QSA Global Model 880D with a 84.6 Ci Ir-192 source.

The following information was provided by the State of California via email:

"On 02/23/17, the RSO [Radiation Safety Officer] contacted RHB [California Radiologic Health Branch] to report a lost I-125 seed with an activity of 0.388 mCi. Licensee stated that three lead pigs each with an I-125 seed (0.303 mCi and 0.388 mCi from February 22nd and a 0.388 mCi I-125 seed from February 8th) believed to be accidentally thrown in Mission Bay Hospital general waste. When this was discovered, licensee contacted Recology, requested an urgent pickup of their waste compactor container at Recology site on 02/23/17. Digging through the waste, licensee was able to locate two of the three lead pigs (both from February 22nd). The pig containing 0.388 mCi I-125 from February 8th was not recovered and believed to be buried in the landfill. UCSF [University of California, San Francisco] was getting seeds from Oncura, [which] was recently bought out by Theragenics. UCSF medical physicists were accustomed to receiving just the patient seeds. Theragenics, the new vendor, had included an additional calibration seed in a separate led pig in the same package and physicist were not looking for this additional seed.

"RHB will be following up on the corrective actions."

CA 5010 Number: 022317

THIS MATERIAL EVENT CONTAINS A "LESS THAN CAT 3" LEVEL OF RADIOACTIVE MATERIAL

Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf